在我国,杂交水稻的种植面积很大,据1983年的统计,这一年全国杂交水稻栽培面积已达1亿亩以上,並获得了良好的收成。但是,从全国不同地区来看,单产相差悬殊,即使在同一地区,不同的年份,单产也有较大的差异,表明杂交水稻在生产上仍然存在着单产不稳和不平衡的现象。为了充分挖掘杂 In our country, hybrid rice has a large acreage. According to the statistics of 1983, the area of ​​hybrid rice under cultivation nationwide reached more than 100 million mu and a good harvest was obtained. However, from different regions of the country, yields are quite different. Even in the same region and in different years, there is a big difference in yield, indicating that there still exist unstable and unbalanced yields of hybrid rice in production. In order to fully exploit miscellaneous